| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic speed change control device improving response of control and convergency by automatically correcting variation of properties of hydraulic control means. SOLUTION: In the automatic speed change control device performing desired gear shift by controlling hydraulic pressure based on speed and throttle opening of an engine 1, a control circuit 11 calculating control quantity for controlling a primary pulley 3 via a primary valve 8 and a secondary pulley 4 via a secondary valve 9, and a hydraulic pressure sensor 12 detecting control hydraulic pressure are provided, feed back control by PID control according to difference between target pressure of a control circuit 11 and actual pressure by the hydraulic pressure sensor 12, control amount is automatically corrected by changing at least integration gain term when the target pressure becomes a predetermined value. COPYRIGHT: (C)2006,JPO&NCIPI |
